数学和英语问题
来源:百度知道 编辑:UC知道 时间:2024/09/21 10:48:21
2.1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256=( )
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1.我能看一看你的新书包吗?
( )I( )a( )( )your new bag?
2.我最喜欢的电影明星是李连杰。
My( )( )( )Jet Li.
翻译:I ask you to drnk up another cup of wine;Once out of the Pass,you will find no old friends.
( )
令m=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
两边同时乘2,得:
2m=1+1/2+1/4+1/8+...+1/128
两式相减,得:
m=1-1/256=255/256
另解:
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
=(1-1/2)+(1/2-1/4)+(1/4-1/8)+...+(1/128-1/256)
=1-1/2+1/2-1/4+1/4-1/8+...+1/128-1/256
=1-1/256
=255/256
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1.我能看一看你的新书包吗?
(May/Can/Could)I( have )a(look)(at)your new bag?
2.我最喜欢的电影明星是李连杰。
My(favourite)(movie)(star's)Jet Li.
翻译:I ask you to drink up another cup of wine;Once out of the Pass,you will find no old friends.
(我请你再喝一杯酒;一旦摆脱了过去,你就找不到老朋友了。)
1. xyz<0
2. 255/128
1.May I have a look at your new bag?
2.My favorite movie star is Jet Li.
我劝你再喝一杯酒;一旦走出了这里,你会再也找不到任何老朋友。(劝君更进一杯酒,西出阳关无故人)
1 小于 2 255/256
1 can have look at
2 favorite actor is
劝君更尽一杯酒 西出阳关无故人
1. <
xy得负,z是正,正负